OK, so I went Left down the vent after Leonard wanted me to help him when he was trying to open the grate.
I'm now at a brick wall with what looks like holes in it, but all I see are options to look at things, I'm guessing the cans and aluminium pipes are key to this as are the holes in the wall, but I can't see any options to do anything else but look at things.
I don't even see a way to back out, so I'll have to go back to a save.
Can anyone give me an idea of what to do (I tried searching for 'wall' and 'pipes' and couldn't find anything)
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In addition to the brick wall problem I am now in Prof Evans' office at night looking for a password, but I'm clueless were to look unless it's a very small point. Nothing has given me a clue except for something that said about maybe she has a laptop, but there is no way back out of that screen that I can see if that is the solution